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In recent years,the rapid popularity of intelligent terminals has greatly promoted the development of crowdsensing service paradigm,which integrates data collection,analysis and processing.As a necessary base to ensure the safe operation of services and encourage the participation of sensing users,privacy-preserving has become the primary issue to be solved.This paper presents the state-of-the-art in privacy-preserving mechanisms for crowdsensing service.After describing its main components,this paper discusses the definition and metrics of privacy-preserving from the view of crowdsensing’s whole life cycle.The privacy-preserving mechanisms designed in literatures are analyzed and discussed according to different stages in crowdsensing’s whole-life-cycle,and the experimental datasets used in literatures are given.Finally,Future research challenges are proposed based on the development of crowdsensing and global regulatory requirements for privacy-preserving.